Roughly two years after a new trial was ordered, Maryland's highest court on Thursday heard arguments in their review of the high-profile case of a man whose murder conviction was chronicled in the hit "Serial" podcast that attracted millions of armchair detectives.

Tasked with upholding the retrial order for Adnan Syed or reviewing a decision that could reinstate a conviction, Maryland's Court of Appeals heard about an hour's worth of arguments in the long-running case. Syed was convicted in 2000 of strangling his high school sweetheart and burying her body in a Baltimore park. He's been serving a life sentence ever since.

But a Baltimore judge vacated his conviction two years ago and a court ordered a new trial after concluding that his trial lawyer was ineffective. The state appealed. Earlier this year, the special appeals court upheld the lower court's ruling. The state appealed that decision, too.

On Thursday, state prosecutor Thiru Vignarajah acknowledged that the late trial lawyer for Syed did not contact an alibi witness but he asserts that the attorney understood the "gist" of what that witness, Asia McClain, might have told her at the time. The attorney in question, Cristina Gutierrez, died of a heart attack in 2004, about four years after Syed was convicted of murdering 18-year-old Hae Min Lee.

"The record is not silent on whether or not Ms. McClain was contacted. The state agrees with that. The record is silent on the critical question of why," he said, suggesting that it is not clear why Gutierrez decided to take one investigative path over another and asserting that it's wrong to conclude that Syed's constitutional right to effective counsel was violated.

In 2016, a lower court ordered a retrial for Syed on grounds that Gutierrez didn't contact McClain and provided ineffective counsel.

The defense team countered that it's entirely irrelevant why Gutierrez failed to contact McClain, who said she saw Syed at a library about the same time prosecutors say his ex-girlfriend was killed in 1999.

Defense attorney Catherine Stetson told Maryland's highest court that Syed's original lawyer's failure to contact the witness were "objectively unreasonable" and any possible reasons don't matter. She said Gutierrez "had an obligation to pursue that witness," among others.

By late Thursday morning, the appeals panel of seven judges wrapped up the day's oral arguments. It's not clear when their review of the Syed case will be completed.

The arguments in the Maryland appeals court brought spectators from out of state. Chris Hendrixson drove from Cincinnati, Ohio, to observe the hearing and perhaps meet some of the people he's heard about on the podcast.